uniconf/unisubtreegen.cc

   1 /*
   2  * Worldvisions Weaver Software:
   3  *   Copyright (C) 1997-2002 Net Integration Technologies, Inc.
   4  *
   5  * A UniConfGen for returning only a particular subtree of a given generator.
   6  */
   7 #include "unisubtreegen.h"
   8 #include "wvbuf.h"
   9 #include "wvtclstring.h"
  10 #include "wvmoniker.h"
  11 #include "wvlinkerhack.h"
  12
  13 WV_LINK(UniSubtreeGen);
  14
  15
  16 static IUniConfGen *creator(WvStringParm s, IObject *_obj)
  17 {
  18     WvConstInPlaceBuf buf(s, s.len());
  19     WvString one(wvtcl_getword(buf)), two(wvtcl_getword(buf));
  20
  21     if (!one) one = "";
  22     if (!two) two = "";
  23
  24     return new UniSubtreeGen(wvcreate<IUniConfGen>(one), two);
  25 }
  26
  27 static WvMoniker<IUniConfGen> subtreereg("subtree", creator);
  28
  29
  30 UniSubtreeGen::UniSubtreeGen(IUniConfGen *gen, const UniConfKey &_subkey)
  31     : UniFilterGen(gen), subkey(_subkey)
  32 {
  33     // nothing special
  34 }
  35
  36
  37 bool UniSubtreeGen::keymap(const UniConfKey &unmapped_key, UniConfKey &mapped_key)
  38 {
  39     if (unmapped_key.isempty())
  40         mapped_key = subkey;
  41     else
  42         mapped_key = UniConfKey(subkey, unmapped_key);
  43     return true;
  44 }
  45
  46 bool UniSubtreeGen::reversekeymap(const UniConfKey &mapped_key, UniConfKey &unmapped_key)
  47 {
  48     UniConfKey _unmapped_key;
  49     bool result = subkey.suborsame(mapped_key, _unmapped_key);
  50     if (result)
  51         unmapped_key = _unmapped_key;
  52     return result;
  53 }